Bullshit. You play defense with both. You use your feet to stay in front of the offensive player and block his path to the basket. You have to use your hands to stop him from shooting or passing the ball. Most of the best defenders in the game will put the palm of their hand an inch from the shooters face so they can't see the basket. It's smart defense. As long as you aren't touching the offensive player, there's nothing wrong with it. The rip move is a bitch move, and the refs shouldn't call that.

So defenders should make it hard for the offensive player to score but the offensive player should back down? GTFO.